Burner system for liquid fuels



Oct. 20, 1953 R. MARTIRI BURNER SYSTEM FOR LIQUID FUELS 2 Sheets-Sheet 1 Filed Dec. 24, 1948 OOOOO0 00 m INVENTOR ROBERTO MARTIRI BY AGENT Oct. 20, 1953 R. MARTIRI 2,655,989

BURNER SYSTEM FOR LIQUID FUELS Filed Dec. 24, 1948 2 Sheets-Sheet 2 VII/I, 11127111111115; 4( (m-xxdmw FIG.5

INVENTOR ROBERTO MARTIRI AGENT Patented Oct. 20, 1953 UNITED STATES PATENT OFFICE BURNER SYSTEM FOR LIQUID FUELS Roberto Martiri, Buenos Aires, Argentina Application December 24, 1948, Serial No. 67,168 In Great Britain December 30, 1947 3 Claims. 1

This invention relates to burner systems of the type which comprise means for supplying hydrocarbon fuel, preferably oil, to a gasifier, a connecting piece between the gasifier and a gas chamber, one or more main burners and a separate auxiliary burner arranged to heat the gasiher and the gas chamber; each of the burners having a separate fuel vapor supply system comprising a mixing chamber, an air inlet duct and a nozzle.

The term gasifier is understood to mean an enclosure in which liquid fuel is gasified by heat.

The term gas chamber is understood to mean an enclosure which serves to store gas issuing from the gasifier and which has a suflicient capacity to absorb sudden load fluctuations and any irregular production of gas that may occur so that the gas supplied to the burners will be of practically constant pressure.

The term mixing chamber is understood to mean an enclosure provided with one or more air inlet apertures through which air is sucked in under the ejector action of the gas supplied thereto and mixes with the gas in the mixing chamber to form a so-called blue burning mixture.

The fuel is preferably supplied under low pressure, for example by gravity feed from a suitable source, as this greatly reduces the possibility of leakage. Other advantages result from the absence of high-pressure means (gas pressure, compressed air, pumps etc.) pressure gauges, high pressure valve-spindle-packings, etc. As a result a system of this type is particularly suitable for use in domestic installations and for cooking purposes, which are not expertly supervised, and it is necessary to meet high requirements as regards safe working, freedom from explosion or fire, simplicity in construction and operation and low initial cost.

In burner systems of this type it has been proposed to provide one 'or more of the nozzles with a valve to shut off the fuel supply. For this purpose the valve with its stem is located longitudinally within the gasifier or in one or more separate housings forming part of the gas chamber, Such constructions, however are rather complicated and expensive.

According to the invention a burner system of the above type is characterized in that at least one of the elements of a valve with its stem is housed within the connecting piece between the gasifier and the gas chamber.

One advantage of the construction according to the invention is that it is much simpler due to the fact that an existing part of the system, viz. the connecting piece, is used in the double function of leading the gasified fuel from the gasifier to the gas chamber and also has a means for housing or guiding one or more of the constituting elements of the valve parts, e. g. the stem, so that a separate housing is superfluous.

Another advantage of the invention is that the extending parts of a separate housing for the valve elements are avoided which results in a construction which is simpler and of smaller volume.

Due to the relatively small dimensions of the connecting piece the elements of the valve housed therein are also of relatively small size.

Another advantage of locating the valve in the connecting piece is that the passageway from the gasifier to the gas chamber can be closed. If no other valves for the auxiliary and/or the main .burners are provided, these burners, which are usually connected to the gas chamber, are extinguished a short time after closure of the passageway. Thus the use of separate valves for the auxiliary and/or main burner may be obviated. Another advantage is that after use of the burner system the liquid fuel in the gasifier no longer heated by the auxiliary burner is prevented from entering the gas chamber and its nozzles, which might cause a fire when the system is heated for a new start.

In a preferred embodiment of the burner system according to the invention the gas chamber is provided with the nozzle of the auxiliary burner and with one or more nozzles of one or more main burners with one of these nozzles arranged in alignment with the main axis of the connecting piece, whereasv the element housed in the connecting piece is provided with a needle member cooperating with said last nozzle. The needle member may be designed as a needle for cleaning the fine aperture in the nozzle or as a needle valve to close said nozzle. In both cases the needle may be combined with a valve housed in the connecting piece.

In order that the invention may be clearly understood and readily carried into eiiect it will now be described more fully with reference to the accompanying drawing, in which:

Figure 1 is a longitudinal section taken along line 1-1 of Figure 3.

Fig. 2 is a sectional view taken along line II-II of Fig. 3.

Fig. 3 is a plan view of a burner according to the invention with part of the main burner broken away and with the main nozzle shown partially in section,

Fig. 4 is a sectional view of another form of connecting piece in accordance with the invention, and

Fig. is a plan view partly in section showing a further embodiment of the invention.

In Figures 2 and 3 a gasifier l is connected by a connecting piece 2 to a gas chamber 3 provided with one or more nozzles 4 and a nozzle 5 located at the end of the connecting piece 2 and in align ment therewith. Nozzle 4 may be used for one of the main burners and the nozzle 5 for the auxiliary burner or reversed.

Each of the nozzles 1 and 5 is provided with a separate fuel vapor supply system comprising a mixing chamber and an air inlet duct. More particularly, nozzle 4 is provided with a mixing chamber 26 and an air inlet duct 21 (see Fig. 2) and nozzle 5 of the auxiliary burner 8 is provided with a mixing chamber 6 and an inlet duct 1.

As shown in Figs. 2 and 3, the auxiliary burner 8 consists of a tubular body with a number of small burner apertures 9 and it is arranged to heat the gasifier i and tubular gas chamber 3. In this embodiment the connecting piece 2 forms a housing for a valve til of nozzle 5 and its rod or stem H (see Fig. 2). Stem H is provided with an operating knob 12 for opening, closing or regulating the auxiliary burner and a needle 25 to prevent clogging of the nozzle opening. As shown in Figure 3, nozzle d is provided with a valve 29 for the main burner cooperating with this nozzle and is provided with a stem [3 and operating knob 14.

In operating the burner shown in Figs. 1, 2 and 3, hydrocarbon fuel contained for example in a storage tank (not shown) arranged above the burner, passes through an intake 28 into gasifier I. Within gasifier I the fuel is vaporized into a gas which passes through the connecting piece 2 to the gas chamber 3 and to nozzle 4 which supplies mixing chamber 26. A portion of the gas is led to nozzle 5 which in turn forms part of the auxiliary burner 6'l-89 which provides the heat required to vaporize the fuel in gasifier I In the embodiment shown in Fig. 4 the connecting piece 32 arranged between gasifier l and gas chamber 3 is provided at its end portion with a nozzle 35. Arranged axially of the connecting piece is a valve stem 31 carrying a valve 30 for nozzle 35 and a valve 33 which is in closed position abuts against a shoulder 37 of the connecting piece 32 and thereby closes the passageway between gasifier and gas chamber 3. A needle 38 is provided on the end of the stem ill to prevent clogging of the nozzle In the arrangement shown in Fig. 5 a gasifier M is coupled by means of a connecting piece 42 to an adjacently-positioned and parallel-arranged gas chamber 43. A nozzle :84 which supplies a main burner (not shown) is connected to the gas chamber 53 in similar manner to nozzle 4 of Figs. 1, 2 and 3. Also coupled to gas chamber 43 is a, nozzle 65 which supplies vaporized.

fuel or gas to an auxiliary burner 48 having burner apertures 49 and comprising a mixing chamber and an air inlet duct 41.

In the arrangement shown in Fig. 5 the nozzles for both the main burner and the auxiliary burner are controlled by a single regulating valve shown as and is entirely housed within the connecting piece 42. A stemor rod 5| for exter- 4 nal manipulation extends from valve 55 through an end wall of connecting piece 42.

What I claim is:

1. A burner system for hydrocarbon fuel, comprising a first tubular member defining a gasifier chamber, a second tubular member defining a gas chamber and arranged adjacent to and substantially parallel to said first tubular member, a third tubular member interconnecting said first and second tubular members at one end portion thereof and arranged substantially normal to the axes of said first and second tubular members, means to supply a hydrocarbon fuel to said first tubular member at a point thereof remote from said third tubular member, at least one main burner, first valve means coupling said gas chamber to said main burner, an auxiliary heating burner arranged to heat at least said first tubular member, first vaporized fuel supply means connected between said auxiliary heating burner and said gas chamber, and second valve means arranged in said third member each of said valve means comprising a head member and an actuating rod member arranged substantially normal to the axis of said second tubular member and substantially parallel to the axis of said third tubular member, the head member and part of the rod member of said second valve means being enclosed within said third tubular member.

2. A burner system for hydrocarbon fuel, comprising a first tubular member defining a gasifier chamber, a second tubular member defining a gas chamber and arranged adjacent to and substantially parallel to said first tubular member, a third tubular member interconnecting said first and second tubular members at one end portion thereof and arranged substantially normal to the axes of said first and second tubular members, means to supply a hydrocarbon fuel to said first tubular member at a point thereof remote from said third tubular member, at least one main burner, first valve means coupling said gas chamber to said main burner, an auxiliary burner having a portion thereof arranged adjacent to said third tubular member and being arranged in heating relationship to said first tubular member, and second valve means arranged in said third member and coupling said third member to said auxiliary burner, each of said valve means comprising a head member and an actuating rod member arranged substantially normal to the axis of said second tubular member and substantially parallel to the axis of said third tubular member, the head member and part of the rod member of said second valve means being enclosed within said third tubular member.

3. A burner system for hydrocarbon fuel, comprising a first tubular member defining a gasifier chamber, a second tubular member defining a gas chamber and arranged adjacent to and substantially parallel to said first tubular member, a third tubular member interconnecting said first and second tubular members at one end portion thereof and arranged substantially normal to the axes of said first and second tubular members, means to supply a hydrocarbon fuel to said first tubular member at a point thereof remote from said third tubular member, a main burner, first valve means coupling said gas chamber to said main burner, an auxiliary burner comprising a mixing chamber portion arranged adjacent to said third tubular member and having another portion arranged in heating relationship to said first tubular portion and said second tubular portion, a nozzle member afiixed to one endof said third tubular member and positioned adjacent to said mixing chamber portion, and second valve means arranged in said third member and engaging said nozzle member, each of said valve means comprising a head member and an actuating rod member arranged substantially normal to the axis of said second tubular member and substantially parallel to the axis of said third tubular member, the head member and part of References Cited in the file of this patent UNITED STATES PATENTS Number 0 the rod member of said second valve means be- 0 Name Date Lehman Oct. 10, 1911 Seitz Dec. 9, 1913 Coleman Aug. 21, 1923 Pickup July 29, 1930 Tullis Feb. 22, 1930 

